Table 1 Numbers of Helicoverpa armigera and Corcyra cephalonica eggs consumed and Manly’s index of preference for nymph and adult of Geocoris ochropterus given a choice of unparasitized and parasitized eggs by Trichogramma chilonis
Lepidopteran egg | Predator stage | No. of unparasitized eggs consumed (mean ± SE) | No. of parasitized eggs consumed (mean ± SE) | Manly’s index of preferencea df = 13, P < 0.001 | |
|---|---|---|---|---|---|
|  |  |  |  | β1 (preference) (mean ± SE) | t |
Helicoverpa armigera | G. ochropterus fifth instar | 20.7 ± 0.76 | 1.64 ± 0.38 | 0.97 ± 0.01 | 80.1 |
G. ochropterus adult | 26.57 ± 1.14 | 3.28 ± 0.22 | 0.95 ± 0.004 | 118.3 | |
Corcyra cephalonica | G. ochropterus fifth instar | 21.29 ± 0.93 | 1.35 ± 0.39 | 0.96 ± 0.01 | 53.6 |
|  | G. ochropterus adult | 23.7 ± 1 | 2.07 ± 0.54 | 0.94 ± 0.01 | 47.2 |